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Re: Pyrocat HD Shelf Life

I mean before use. I always throw out developer after use.

I'm asking because, for instance, using HC-110, I leave it in concetrated form, and mix only enough developer to develop my current batch of negatives. HC-110 has a much longer shelf life in concentrated form. I want to know if I can do that with Pyrocat HD, or if I should mix the whole thing into working solution. If so, I'm guessing that the shelf life is much less. If it is, it would be wasteful for the amount of film I develop.

I can't tell from the package whether it is water or Glycol, and their website doesn't say either. The catalog number is 01-5081. Could be one of those things where if it doesn't say "Glycol" explicitly, that means water.

Re: Pyrocat HD Shelf Life

It is obviously a product that Digitaltruth buys from Photoformulary, as the catalog number is the same and Digitaltruth promotes the fact that it is a Photoformulary product.
Now, the only remaining question is whether your kit has been on the shelfs for a long time or if it's fresh. (Or: Did Photoformulary change the catalog number when they switched to Glycol?)

Re: Pyrocat HD Shelf Life

Even the water-based version has a long shelf life. I would say 6 months, if stored in a cool environment. If you are concerned, you can add some inexpensive glass marbles to the bottles, to displace additional air.